On 29 Jul 2009 , freebsd-questions-requ...@freebsd.org entreated
"freebsd-questions Digest, Vol 269, Issue 6":
> After one of the last crashes, the system would lock up a short time
> after rebooting. I found the problem caused by background fsck locking
> up the system. I took the partition out of the startup check for now.
> I 'think' I was installing a port during the last crash, but it has
> been a while. I performed a fsck and a dump (to /dev/null) confirming
> that both do crash the freebsd 7.2 and 6.2 (which I booted off of a
> separate drive). A tar to /dev/null did run successfully, but I recall
> reading that that is not a recommended way to backup/move a
> filesystem. The /usr partition where it causes trouble is in a raid5
> geom_vinum three drive array. I did not yet have the array rebuild the
My experience has been that dump *with snapshot* of a live filesystem
will crash if the filesystem is 'large'. MY solution is to umount
the partition. This happens with my 800GB /home which is part of a 4
drive raid5 array (ar driver with hardware setup). It used to happen
with the previous 320GB mirror array too, just with /home which is
the biggest partition. This is one reason I moved away from tape
backup to a secondary server full of harddrives as backup target, the
tape took far too long with /home unmounted and users were affected.
As for the fsck crashing, I'm lost. Maybe a faulty drive?
DA Fo rsyth Network Supervisor
Principal Technical Officer -- Institute for Water Research
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